When I moved my 550 lb Guzzi I didn't use any chocks and just two straps from the handle bars. It didn't budge in 800 miles. What I have done in the past is take sheet of plywood and screw pieces of 2x4 on either side of the tires so the fork won't turn and the rear wheel can't hop side to side.
A higher tech approach would be to get one of the ride in chocks.
Here is one, there are others:
http://www.bikersfriend.com/pages/stand.htm